Combined typewriting and com



Feb. 17, 1948. H. L. PITMAN I I COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed June 29, 1940 5 Sheets-Sheet I INVENTOR HENRY L. PITMAN ATTORNEY Feb. 17, 1948'. H. L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE 5 She'ets-Sheet 2 Original Filed June 29, 1940 ATTORNEY INVENTOR Wm \aw HENRY L. PITMAN 5 Sheets-Sheet I5 Feb. 17, 1948. H, L. PITMAN COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed June 29, 1940 BY K;

' ATTORNEY Feb. 17, 1948. HTMAN 2,436,055

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed June 29, 1940 5 Sheets-Sheet 4 INVENTOR HENRY L. PITMAN ATTORNEY Feb. 17, 1948. 1 HTMAN 2,436,@55

COMBINED TYPEWRITING AND COMPUTING MACHINE Original Filed June 29, 1940 5 Sheets-Sheet 5 INVENTOR HENRY L. Pl TMAN BY K ATTORNEY Patented Feb. 17, 1948 COMBINED TYPEWRITING AND COM- PUTING MACHINE Henry L. Pitman, Melbourne, Fla, assignor to Underwood Corporation, a corporation of Delaware Continuation of application Serial No. 343,117.,

June 29, 1940. This a Serial N0. 494,434

15 Claims. 1

This application is a continuation of my earlier iiled application Serial No. 343,117, now abandoned, filed June 29, 1940.

The invention relates to accounting machines and deal with multiple-register mechanism. More particularly, the invention reals with multipleregister mechanism for a combined typewriting and computing machine of the Underwood-Hanson class exemplified in my U. S, Patent No. 2,192,365, dated March 5, 1940.

In that class of machine, a typewriter unit surmounts and is cooperative with a computingbase. A plurality of individual computing-wheel sets or registers, and sets of indexable actuators therefor, are distributed laterally within the com muting-base. The actuators are indexed for a given amount through operation of numeral keys in the typewriter and are selected for indexing under control of the typewriter carriage when the latter traverses a computing zone at operation of the keys. A general operator is subsequently cycled to drive the indexed actuators to run the indexed amount into the computing wheels.

The general object of the invention is to provide an improved combined typewriting and computing machine.

Another object resides in providing a machine of the Underwood-Hanson class which, as compared with prior machines of this class having a given number of registers, has a materially lesser number of mechanisms cooperative with these registers and accomplishes this vast redutin of operating parts without in any way curtailing the flexibility of the machine in its application to the various computing problems.

A further object is to increase the number of registers or computing-wheel sets in the computing-base, substantially without increasing the dimensions of the base.

Another object is to increase the number of computing wheel sets by contriving that the actuators, and other devices, serve for a plurality of sets of wheels instead of merely serving, as heretofore, for only one set of wheels.

A further object is to materially increase the number of registers or computing wheel sets, in a machine of the kind shown in my prior Patent No. 2,192,365 affording the salient features of adaptability to the many computing problems. Among these features is the capability of the machine of registering overdrafts or negative totals in the computing wheels and of automatically typing the true overdraft totals as instituted by the computing wheels.

pplication July 10, 1943,

Another object is to have the lateral registerselecting shifts of the group or groups of interspersed registers determined automatically under control of the typewriter carriage in respect to difierent computing zones in the carriage travel.

Another object is to have the carriage control of the group-shifts take place in appropriate correlation, with group selection, denomination selection and state control by the carriage. In this connection, it is a further object to supplement and coordinate carriage control structure as used for register selection, denomination selection and state control with carriage control structure for effecting the lateral shifts of the groups.

Another object is to eil'ect the lateral shifts of the groups by power and merely under control of the carriage so that the usual spring motor of the carriage is not overloaded. A power-drive separate from the general-operator mechanism may be provided for group-shifting the registers. This separate power-drive is workable between, and therefore independently of, cycles of the eral-operator mechanism. Mechanism operable for group-shifting the registers may be rendered cooperative with such separate power-drive under control of the carriage so that the latter determines for a given computing zone of its travel which set of wheels of a group is to be active.

Another object is to provide for suppressing group shifting of the registers while the machine is being cycled or is effective for other functions, such as total-taking, Conversely, cycling or effectiveness for other functions may be suppressed during the time that th registers are being group-shifted.

Another object is to provide for ready removal and replacement of a register-unit, and this is advantageous irrespective of whether the unit comprises a single register or a plurality of registers.

Other objects, features and advantages will hereinafter appear.

In the drawings:

Figure 1 is a side elevation of cycling-clutch mechanism.

Figure 2 is a cross sectional side elevation of a combined typewriting and computing machine embodying the invention.

Figure 3 is a perspective of the mechanism operable under control of the carriage for shifting the multiple-register units to select one or another register of a unit.

Figure 4 is a, side-view diagram of mechanism relating to release 01' totalsreading feelers.

" ure 5 is apeispective of the register-shifting mechanism as operated for a register-shift I difierent from that of Figure 3.

Figure 6 is a plan view diagram of the multipleregister-units and their shifting mechanism.

Figure 6A is a plan view diagram of lock details. I

Figure '7 is a perspective showing a multipleregister unit as detached from the support that is movable to bring the registers into and out of engagement with the actuators.

Figure 8 is a perspective of carryover-trip and detent elements of the register unit.

Figure 9 is a perspective similar to Figure '7 but showing the register-unit in place on the movable support.

Figure 10 illustrates a detail of the computing pinion.

Figure 11 is a perspective illustrating the relative positions of tappets on the carriage for controlling total-taking and register-shifting.

Figures 12, 13, 14, 15-and 16 are top plan view diagrams of the multiple-register unit and its relation to differentparts of the mechanism that is common to the computing wheel sets of the unit.

Figure 17 is a front elevation showing the parts of the register-unit frame separated to illustrate details.

Figure 18 is a cross-section view of a computing wheel.

Figure 19 is a perspective of supporting means for the register-shift controls that are operable by the carriage and also illustrates the disablement of said supporting means to disable operation of said controls by the carriage.

Typewriter unit T, Figure 2, has a main frame F supporting front and rear rails 20, 2| for a carriage 22 mounting a platen 23. Numeral keys 24 are mounted on key stems 24 operatively connected at 25 to a'draw-link 26 pivoted at 21 to a stationarily fulcrumed lever 28. Each lever 28 is connected by a link 29 to an operating lever 3|! connected by a'bellcrank 3| to a numeral type bar 32. By depressing any key-stem '24, the corresponding draw-link 26-is turned counterclockwise about its pivot 21 toengage its rear end with a continuously rotating snatch roll 34. The resulting rearward stroke of draw-link 26 depresses the corresponding operating lever 30 to drive the corresponding type bar 32 to print against platen 23. The terms, such as rearward, forward, leftward and rightward, as used herein are based on looking at the machine from the front. Drawlink 26 becomes disengaged from snatch roll 34 just before type bar 32 reaches the platen and therefore the described type-action parts return automatically to their normal positions following printing. I a

A universal-bar 36 enables any type bar 32 to actuate escapementdogs 31 .relatively to an'escapementwheel 38 having a pinion-,and-rack connection 39 to carriage 22.v A spring-motor 40 drives the carriage in letter-feeding direction.

Typewriter unit T surmounts a computing base B, Figure 2. A plurality of sets of actuators or register bars 4| having-racks 42 are distributed laterally, Figure 6, within computing base B. A set of idlers 43 is permanently in mesh with each set of racks 42.

Computing wheels 44 associated with each set of racks 42 and idlers 43 are collectively mov able from the normal disengaged position, Fi ure 2, to engage racks42 for addition, or idlers 43 for "subtraction during advance of register Each register bar 4| is normally positioned so that its digital index-pins 46 are out of the path of descent. of transverse pin-setting bars 41 individually operable by corresponding rock shafts 48 laterally distributed below corresponding type bar operating levers 30. When any lever 30 is depressed, a pendent rod 49 thereon engages a crank arm 50 of corresponding rock shaft 43 and rocks the latter to depress the corresponding pin-setting bar 41 through linkage 5|.

The register bars 4| of any selected set are slightly advanceable in succession to bring their pins 46 under pin-setting bars 41 in coordination with the operation of numeral keys 24 and the attendant step-by-step feed of carriage 22 at a computing zone. For each computing zone. corresponding to a work-sheet column, carriage 22 is provided with a column unit 52 having a denom ination-selector tooth 53 to traverse a universal set of vertical jacks 54 arranged in a row in the direction of carriage travel. At each denominational position of carriage 22 in a computing zone, the tooth 53 for that zone depresses a cor.- responding jack 54.

A set of bell cranks 55 is operatively connected to jacks 54 by connections diagrammatically represented by the dot-and-dash lines 56, Figure 2. Bell cranks 55 are on a fulcrum rod 51 and abut a set of corresponding master racks 64 individually articulated as at 58 to a set of transverse blades 59 rockable about their lower edges in notched supports 60. Behind each set of register bars 4| there is a set of distributive racks 6| also articulated to blades 59 and presenting a set of couplers 62 pivoted to said racks 6|. For each set of couplers 62, there is a shifter-plate 63 movable vertically for shifting the pivoted set of couplers, up or down, into or out of operative alignment with the set of register bars 4|.

A group of cam plates 65. one for each set of register bars 4|, are guided at their opposite side edges in upper and lower guide combs 66 included in a housing 61 which also slidably sup: ports jacks 54 and is supported by the typewriter framework. Cam plates are selectively de-- pressible by tappets 68 placed on the column units 52, each of which may have one or more of said tappets. The several cam plates 65 have operative connections, diagrammatically represented by the dot-and-dash lines 69, Figure 2, to the coupler-shifter plates 63 so that depression of any cam plate 65 by a carriage tappet 68 lifts the corresponding-coupler-shifter plate 53 to bring the corresponding set of couplers 62 into operative alignment with their corresponding set of register bars 4|. A selected cam plate 65 is kept depressed by tappet 68 while the denomination selecting tooth 53 depresses jacks 54 seriatim in a computing-zone traverse of carriage 22. Thus,- the register bars 4|. of any set connected to the jacks 54 are advanced seriatim-to bring their pins 46 under the pin-setting bars 41. For each set of register bars 4|, there is a statecontrol bar 16, Figure 2, urged forwardly by a spring H but normally restrained by a latch 12. Depression of a cam plate 65 by the carria e lifts and thereby retracts a corresponding latch 12',

from the state control bar 19 so' that the latter moves forwardly until stopped by a secondary; latch 13. An operative connection, not shown,.

enables the shifter plate 63, when lifted by said depression of cam plate 65, to also lift latch 12.

If latch 13 is also retracted by means of a subtraction control, not shown, bar 70 moves still' farther iorwardto an extreme position. Following the indexing of the register bars 41 of any set selected by depression of its cam plate 65. and further selected denominationallyby tappet. 53, a general operator mechanism is cycled. During the cycle, a cross-bar I5, included in said mechanism, is reciprocated forwardly from and back to the normal Figure 2 position. Cross-bar I5 carries a pin-engaging lever I6 for each register bar. With the advance stroke of cross-bar 15, the upper arms of levers I9, backed by said crossbar. engage those index pins 46 that were set downwardly at the indexing operation and thereby the register bars are advanced to extents depending on which pin were set; in the several bars. Before any registerbar 4| is picked up and advanced, a rock shaft 11, Figure 7, journaled in the computing base framework, is rocked clock wise. A coupler I8 is shiftable longitudinally of shaft 71 from a neutral position to an add position orsubtract position determined respectively by the partial or full forward shift of a corresponding state-control bar 19. In its add position, coupler I8 couples an arm 89 to shaft 77; while in its subtraction position, it couples a bail 8I to shaft 71. As, will be discussed more fully later, arm 89, or bail 8 I, when rocked, clockwise by shaft I7 effect engagement of the computingwheels 44 with racks 42 or with idlers 43 before the advance of the, register bars during the cycle. Before return of the register bars by cross-bar I5 during the cycle shaft 7! is rocked counterclockwise to disengage the computing wheels 44 from racks 42 or. idlers 43.

When a computing wheel 44 rotates through a transfer point, it is operative as will be discussed later, to rock counterclockwise, Figure 2, a, lever 83, which in turn raises the forward end of a bar 84 from latching engagement with a transverse bar 85. Bar 84 is pivotally connected to a, stationarily-fulcrumed lever 86; having a lateral stud 81 in line with the pin-engaging lever 18 for the register bar of next higher denomination to said wheel 44. Upon its disengagement from transverse bar 85, the carryover bar 94 is moved forwardly by its spring 81 and thereby turns lever 86 counterclockwise, until arrested by a stop bar 88, to shift stud 87 rearwardly into the path of the lower arm of said lever I6. This determines rocking of said lever 76 relatively to the cross. bar I5 to advance said next higher register bar an extra carryover step beyond the advance of cross bar I5.

A latch arm 82 is turnable counterclockwise of Figure 1 to retract it from a stud 89 on a plate 99 that is turnable about and with a transverse cycling shaft 9| journaled in the computing base framework and having a crank and pitman connection, not shown, to cross-bar I5 for reciproeating the latter. When plate 99 is latched, studs 92 thereon keep spring-pressed clutch-pawls 93, mounted on an adjacent plate 94 fixed to shaft 9|, disengaged from a motor driven toothed driver 95. which normally is rotatably loose on shaft 9|.

Upon retracting latch arm 82, plate 99, spring pressed, is turned, with its studs 92, clockwise relatively to plate 94 to permit pawls 93 to engage driver 95 for a resulting cycle or clockwise revolution of shaft 9| together with plates 99, 94. The cycle is completed when stud 89 is intercepted by the meanwhile restored latch arm 82 to cause retraction of clutch-pawls 93 from driver 95.

In the instant machine there are, illustratively, three sets of register bars 4 I, Figure 6, and corresponding sets of idlers 43 and sets of the abovedescribed carry-over parts. including levers 89.- 7

Each set or idlers 43- has an individual arbor 98 supported between a. pair of upright flanking plates 9.9 fixed to across member I 99 of the computing -base framework. Adjacent the inner sides, of plates 9.9 there are a pair of plates I9! rigidly joined, Figures 7 and- 9, to a tie rod I92, to a cross bar I93, and; to a fulcrum rod I94 for the carryover levers 83, to form a, shiftable frame or support I95 for the computing wheels 44, Each plate I III has av substantially horizontal slot I95 to slidably embrace idler-arbor 98 Or a collar thereon. Arm 89 on shaft 'I'! has a slot I97, to embrace tie. rod 102 ofthe frame. Normally,

when the computing wheels 44 stand disengaged from racks 42 and idlers 43 as in Figure 2, arm 89 is upheld by an underlying stud I98, Figure 7, on an arm I99 fixed to shaft I1 and embracing coupler (8 at III] for rocking said coupler and permitting movement thereof along shaft 11.

In response to the hereinbefore-mentioned partial forward movement of state control bar I9,

coupler 18 is shifted rightwardly from the Figure 7 neutral position so that a tongue III thereof overlies arm 89. Therefore, when shaft I7 and coupler 18 are rocked clockwise, arm 89 will be,

rocked downwardly to depress frame I95 about idler-arbor 98 to mesh the computing wheels 44 with racks 42 for addition.

In response to full forward movement of state controller bar 19, coupler I8 is shifted leftwardly from the neutral Figure 7 position so that a tongue II3. thereof underlies an edge II4 of bail 8I. Therefore, when shaft I1 and coupler 18 are rocked clockwise, bail 8| will be similarly rocked and being connected to frame I95 by side links I I 5 will move said frame iearwardly to mesh computing wheels 44 with idlers 43.

In the normal and the rightwardly-moved positions ofcoupler '18, its tongue II3 is within a clearance notch IIG of bail 8! so that when the coupler is rocked in these positions it will not influence bail 8I. When arm I99 is rocked downwardly without rocking arm 89, the frame I95 remains upheld by side springs II! which hold side studs I I8 of said frame in abutment with an overlying edge of an anchor piece I I9 fixed to the flanking plates 99, said springs being stretched between said studs and anchor piece, Figure 7.

The described connections for shifting frame I95 are substantially as shown in my U. S. Patent No. 2,091,717, dated August 31, 1937. The machine as so far described is also substantially like that disclosed in my aforesaid Patent No. 2,192,365, and the clutch mechanism, Figure 1, is substantially like thatv in my U. S. Patent No. 2,178,702. These patents may be referred to for further details.

The register bars 4| of each set run in a front comb bar I2I, supported between flanking plates 99, and in a rear comb plate I22 supported by the framework. These comb members space the register bars laterally at, say, one-quarter inch intervals from each other. Idlers 43, carryover levers; 83 and carryover bars 84 are also spaced bytheir supports at. these intervals.

The novel multiple-register mechanism and associate features will now be described.

A set may consist of, say, eleven register bars 4|. In the instant machine there are associated with each set of register bars 4I double the number of computing wheels 44, that is, two c0mputing wheels of the same denominational order for each register bar. All said computing wheels may be evenly spaced along a common arbor I23 at intervals corresponding to one-half the register- 7 bar spacing. There are, therefore, two sets of computing wheels 44 for each set of register bars H, and these two sets are interspersed and are coaxial on the common arbor I23. By shifting.

the entire group, comprising the two sets of wheels, laterally, one or the other set may be brought into cooperative relation with the common set of register bars M and idlers 43. It will be understood that the extent of the shift in either direction corresponds to the lateral spacing between the two computing wheels for a register bar.

enter said plates I25 for support. A sub-frameis thus formed in respect to the frame formed by plates 99 and IN. Each computing wheel 44, Figure 18, comprises a pinion 44 and, fortotal reading, a disk I34, Figure 3, having notches I35- of graded depths forming a digit spiral. Disk The ends of arbor I23 are shouldered as at I24,

I34 is spaced from pinion 44 by pinion hub I36,

and the hub and disk are secured rigidly together as at I31. The aggregate width of the wheel is substantially equal to the required spacing from one wheel to another. The aggregate width of all the wheels and a spacer I39, Figure 12, takes up the space between the side plates I25 but without binding the wheels so as to permit free individual rotations of the latter on arbor I23.

A detent arm HH and a carry-trip lever I42 foreach computing wheel are iulcrumed side by side on rod I29 which has stepped grooves I43, Figures 8 and 17, to fit open fulcrum slots I44, I45 in arm MI and lever I42 respectively. Slot'I45, Figure 8,"

has a circular portion for fitting over the larger part of rod I29 within the stepped groove but'theouter portion of said slot I45 is constricted. In

placing lever I42 on rod I29, the constricted por-" tion of its slot I45 is first introduced" over the smaller part of rod I29 within the stepped groove and then the larger circular portion of slot I45" is placed over the larger part of rod I29 within the stepped groove. A detent arm MI is then put in. place with its slot I44 engaging the smaller"? rod part within the stepped groove.

A bar I46 of U-shaped section embraces rod I31, and its flanges serve for anchoring tension springs 541, Figure 2, one spring for each of the detent arms MI and carry-trip levers I42. The.

grooved rod I29 spaces the detent arms I 4I and carry-trip levers I42 in pairs at intervals, equal tothe spacing of the computing wheels. Springs I-41 for the carry-trip levers I42 normally keep j the latter in abutment with rod I 32 so that a cam-- pointed tongue I48 on each lever I42 is in the.

path oia carry-over kicker pin I49 of the corresponding computing wheel. The kicker pin I49, Figure 18, is riveted to the disk I34 of .its wheel. Each detent arm MI is pressed by its spring I4! to keep its detent nose I 4 I between any two adjaa cent-teeth of the companion pinion 44 to detent the wheel in any digital position. i

Each plate IOI of the shiftable frame I05 has: upper and lower open notches I5I, I=52, Figure 7,

into which are received respectively the upper andlower gudgeons I30, I26, FigureQ, of the register unit which is designated generally by the. letterli. and comprises the computingwheels 4,4, "element l63, Figure 2, may be depressed. The;

the detent arms I4I. the carry-trip levers I42,

and the frame made up of the plates I25 and their connecting cross members I23, I29, I3I.

and I32.

Each side plate IOI of frame I05 has pivoted thereto a catch hook I54 which may catch the upper gudgeon I30 of the register unit as in Figure 9 to keep the unit seated in frame I05, and which hook may be retracted as in Figure 7 for permitting removal of the unit. A spring I55 is attached to each catch hook I54 and to a stud on plate I M and may throw to either side of the catch hook pivot to detent the catch hook yieldably in either position. Each catch hook may have a finger piece I54 for manipulation.

-The notches I5I, I52 slidably support the register unit R at its gudgeons I30, I26 so that the unit is movable laterally in the frame I05 in opposite directions to bring either of its interspersed registers or sets of wheels 44 in cooperative relation with the common set of racks 42 and idlers 43 as will be evident in Figure 15. The lateral shifts of the unit also bring either of its interspersed sets of carry-trip levers I42 into cooperative relation with the common set of carry-over levers 83, as will be evident in Figure 16. When an active wheel 44 rotates, either in add or subtract direction, past the carry-over or transfer point, its kicker pin I49 passes the cam-pointed tongue I48 of the companion carrytrip.lever I42 to actuate the latter and hence the lever 83 to release bar 84 to determine an extra carryover advance of the next higher register bar.

.The laterally stationary bar I03 of frame I05 has a row of alternate teeth I56 and notches I51.

opposite the detent arms I4I. As will be seen in Figure 12, the notches I5'I are always opposite whichever set of detent-arms I4I corresponds to the effectively positioned set of computing pinions .44 so that said arms I4I of that set are free to'move outwardly to permit rotation of the computing pinions 44 But the teeth I53 oppose or limit movement of the other or ineiiectively positioned set of arms MI and hence lock the corresponding set of pinions 44 against rotation. The notches I5! may be also always opposite the set of efiectively positioned set of carry-trip leversv I42 to permit free movements of the latter.

A register-clearance-detecting bail bar I58 has side arms I59 pivoted to the side plates I M of frame I05, Figures 2, 9, 14. Said bar I50 has a row of cam-bevel-sided teeth I50 and interdental notches IBI. The teeth I60 are always opposite whichever set of detent arms I M corresponds to ,the efiectively positioned set of pinions 44'.

Each computing pinion 44* has two adjacent teeth recessed as at I62, Figure 10, so that when the pinion is in zero or clear position, the detent arm I4I settles more toward the center of thegmpinion than if the wheel stood at a non-zero position. Each detent arm MI is thus capable of assuming either a clear position or a non-- clear position; I If a set of wheels is not clear so that one or more of its detent arms I4I stand at non-clear position, such arms will position bar said arms I4 I.

ance indicating mechanism. In the instant machine, the position of bar I58 determines whether or not a clear-sign-mechanism control sides of the teeth I90 are cam beveled as in Figure 14 so that any detent arm I4! that happens to be in non-clear position as at MI Figure 14,

when the unit R is to be laterally shifted will not interfere with the shifting, but instead may cam the bail bar I58 outwardly asthe shift is made. The locking edges of teeth I 56 of bar I03 are sufficiently forward of the detent arms I9I to permit any one of the latter to be in non-clear position as will be seen in Figure 12. But full outward movement of any arm MI is still blocked by means of said teeth I56 to prevent rotation of pinion M In Figures 12 and 14 one of the arms I 4I is shown in non-clear position at I6! While the other arms are in clear positions.

Mechanism for laterally shifting the register units R automatically under control of the typewriter carriage will now be described.

An electric motor M is mounted at the back of the typewriter frame and to the left, Figures 3 and 6, of the housing 61 which contains the cam-plates 65. A speed reducing belt-andpulley drive I64 connects the motor shaft to a countershaft I65 journaled on the typewriter frame and extending rightwardly beyond the right side of the housing 61. A pinion I66 fixed to countershaft I65 meshes with a larger gear I61 fixed to a short shaft I69 and their bosses I of a bracket I1I fixed to the back of the typewriter frame by screws I12, Figure 2. A spiral cam I13 and its hub I13 are fixed to shaft I68 and said hub and the hub of gear I61 abut arms I69 to hold shaft I68 and its cam I13 laterally stationary.

A rock shaft I14 is journaled in arms I69 and their bosses I and to it is fixed an arm I16 and its hub I'I'G An arm I11 and its hub I11 are also fixed to shaft I14. Said shaft and its arms I16, I11 constitute a cam-follower structure shiftable laterally as a unit in opposite directions to place either arm in operative connection with cam I13, each arm having a cam-following roller 118. An extension I19 of arm I11, Figures 2, 3, 5 and 6, has a forked end I80 to straddle shaft I14 and also has a slot I8l for a screw I82 securing said extension to arm I11. A stud I83 in extension I19 engages in a slot I84 of anarm I85 fixed to a laterally-stationary transverse rock shaft I86 journaled in a bracket I86 Figure 6, and in a side wall W of, the computing base framework. The forked end I80 and slot I8I of extension I19 permit the latter to be adjusted endwise to adjust the distance of stud I83 from shaft I14 and thereby regulate the extent of rockin movement of shaft I86 relatively to the fixed extent of rocking movement of shaft I14 by cam I13.

Another arm I81 fixed to shaft I36 is connected by a link I88 to a bell crank I89 turnable about a vertical pivot I90 in the top of'a cross bar I9I of the computing base framework, Figures 2, 6. A pin-and-slot connection I 89 connects bell crank I89 to a transverse bar I92 supported and guided, for endwise shifts, by brackets I93 and pin-and-slot connections I94 "to said brackets which are secured to bar I'9I by screws I95. Plates I91 are fixed to bar I92 by screws I98 and present pairs of downturned ears I99, see also Figure 3, for engaging each register unit R at the outer faces of its pair of side plates I25. Therefore, the lateral or endwise shifts of bar I92 are imparted to the register units R. 'Each unit R in either of its lateral positions is shiftable independently of theothei' unitsto mesh either with racks 42 or idler's' l3i Ears I99 are proportioned I68 journaled in arms 10 to remain in contact with plates I25 irrespective of movements of the register unit R to engage said racks and idlers. With shaft I14 positioned laterally as in Figures 3 and 6 so that roller I18 of its arm I16 is above cam I13, said shaft I14 and its arms I16, I11 will become rocked clockwise to the Figure 3 position by cam I13 which rotates constantly clockwise. But with shaft I14 positioned laterally as in Figure 5 so that the roller of its arm I11 is below cam I13, said shaft I14 and arms I16, I 11 will become rocked counterclockwise to the Figur'efi position by the clockwise rotation of cam I13, The opposite movements, clockwise and counterclockwise, of shaft 114 operate through the described train to shift the bar I 92 and all the register units R leftwardly and rightwardly, respectively, as seen from the front of the machine. In this way, one or the other of the interspaced sets of computing wheels 44 of each unit It may be brought into cooperative relation with the common cooperable mechanism, comprising the register bars M and other common elements. Stud I83 in extension I19 is elongated so that it always engages the laterally-stationary arm I irrespective of the lateral shifts of said stud I83 with shaft I14.

A plate 200 is pivoted to bar I92 and is spring pressed to engage one or the other of its detent notches 20I with a tongue 202 fixed to stationary bar I9I. This detent device yieldably holds bar I92 and the register units R in their laterally adjusted positions.

Two jacks or cam plates 204, Figures 2, 3, 5, 6, are alternatively depressible by means of the typewriter carriage 22 to effect the alternative lateral shifts of rock shaft I14. A plate 205 disposed between said plates 204 is stationary as will be discussed later and has pivoted thereto at 203 a lever 206 having opposite lateral arms 206. Studs 201 on said arms 206 are on opposite faces of said lever 206 and underlie and are engaged by respective cam plates 204. A depending arm 208 of lever 206 has a circular end 208 between and abutte'd by tabs 209 connected to a transverse bar 2I0 slidable endwise in slots 2 of guide plates 2I2 fixed to the sides of housing '61 which has clearance openings 2I3 for said bar 2I0. Each tab 209 is on a strip 2I4 having slots 2I5 to engage headed studs 2-I6 on bar 2| 0 for slidable support on the latter. A stud 2 I 1 on each strip extends through a clearance slot 2 I8 in bar 2I0 and to it there is attached a spring 2I9 anc'hored to an'extension of one of "the studs 2I6, as in Figure 6. The outer end of a slot 2I5 of each strip abuts its stud '2I6 to limit the inward movement of the strip; with the strips thus stopped, their tabs 209 are spaced to abut the circular end 208 of arm 208 A block 222 is removably fixed to bar 2I0 by screws 223 and fits between arms I16, I11 for shifting said arms and their shaft I 14 laterally by the endwise movements of bar 2I0. A lightlyspring-pressed detent, diagrammatically represented at 224, may be provided on one side of the housing 6"1-to'enga'ge one or another detent notch 225 in bar 2I0 to maintain the latter in either of its positions. The described springs 2I9 form yieldable connections which .permit either cam plate 204 to be depressed by the carriage even though there may happen to 'be a stoppage in the train from the slide bar 2I0 to the register mechanism. For example, it may occur that roller I19 of arm I16 or I11 momentarily encounters a side of the constantly rotating cam I13 when one or another cam plate 204 is being de- ,yields, and subsequently completes the shift as .soon as cam I13 has rotated sufficiently to permit the interfering roller to move over the periphery of cam I13. 7

Cam plates 204 are grouped with and are behind the cam plates 65 in housing 61 for coordinate selective operation of one or another cam .plate 204 with any cam plate 65. Said cam plates 204 and their intermediate supporting plate 205 are guided vertically'in the guide combs 66 of said housing 61. Plate 205 rests upon a transverse plate 230, Figure 19, that is similar to transverse plates that uphold cam plates 65 and form part of the operativeconnections diagrammatically represented at 69, Figure 2, Such trans- .verseplates are shown in my aforesaid Patent No. 2,192,365. Plate 230 rests upon a rod 23L Figure 19, connected to a lever 232 having a fulcrum rod 233. .An arm 232 of lever 232 abuts a fixed stop 235 and thereby, with the fulcrum rod 233 in normal position, maintains the upper plate 205 and cam plates 204 at such elevation that one or the other of the cam plates 204 is in the path of a corresponding tappet 234, Figures 2, 11, provided on one or another column unit 52 .on thetypewriter carriage. Fulcrum rod 233 is connected by side links 236, Figure 2, to horizontal arms 23'! fixed to a rock shaft 238 which also has vertical arms 239 supporting fulcrum rod 5'! for the bell cranks 55. I

As soon as a c'ycle of the general operator, including cross bar 15, gets-under way, shaft 238 is rocked clockwise to lower the rod 233 to the dotted line position, Figure 19, thereby causing ing plates 204, 205 to drop so that cam plates 264 are out of the path of the carriage tappets 234. Therefore, the carriage is inoperative 'during a cycle to cause lateral shift of the register units R. Mechanism for thus lowering the rod .233 may be as shown in my U. S. Patent No. 2,160,487 dated May 30, 1939. Such mechanism may also operate to lower said rod 233 during the usual power-return of the carriage as set forth in said patent. Therefore, the register units will not be idly shifted laterally during such carriage-return. v

The machine may be equipped with automatic total-printing mechanism. For a register unit B there is a set'of total-reading feelers 24f, said set being common to the interspersed sets of computing Wheels 44 of said unit. By shifting the register unit R'laterally one or the other set of disks I34 is brought. into operative alignment with the common set of feelers 24I as will be evident in Figure 13. Each feeler is urged by a spring 242, Figure 2, toward the disk I34 and normally all the feelers are held retracted in the Figure 2 position by a transverse bar 243. Said bar 243 has a connection diagrammatically rep resented at 244, Figure 4, to an arm 245 and its rock shaft 246 in the computing base. A stud 24? on arm 245 is normally caught by a latch arm 240 fixed. to a transverse rock shaft 259 "jo'urnaled in the computing base. By rocking shaft 249 and latch arm 248 clockwise, arm 245 is released for resulting movement, to the left of Figure 4, so that bar 243 recedes from feelers 24I and the latter move to engage whichever of disks I34 .is in operative alignment with said feelers; Leftward movement of arm 245 by its spring 250 is limited by. astop 25!. lllpon depression ofa total key lever 252, Figure 2,car.- riage 22 is tabulated leftwardly toward a totalprinting zone where a tappet 253 on a column unit 52 depresses a cam plate 254 which has an operative connection diagrammatically represented at 255, Figure 4, to latch arm 248 to retract the latter to release the feelers 24I. The released feelers 24I assume positions, against disks I34, corresponding to the total in the active set of computing wheels 44. Correspondingly, a type selector, not shown, on each feeler 24I is positioned under one of a set of transverse blades 256, Figure 2, corresponding to the numeral type actions, for selecting the latter for ensuing total-printing operations, by snatch roll 34, under denominational control of the carriage 22. I

For a fuller explanation of the total-printing mechanism, reference may be had to my aforesaid Patent No. 2, 192,365. As afore indicated, the present machine, with its interspersed totalizers, is contrived to afford the advantageous puting wheel standing at 9, The highest order disc I34 is arranged so that, standing at the 9 position, the corresponding feeler 24I will become positioned, with its selector, not shown but similar to selector 466 of said patent, under the eleventh blade which may be the last one toward the right of Figure 2. When the carriage is positioned at the place corresponding to the denomination of the highest order totalizer wheel, said eleventh blade 256 becomes lifted by means of such selector and, consequently, a case shift mechanism, not shown, becomes operated. A fugitive one mechanism is provided so that in the case of an overdraft it is the nines complement of the true overdraft which is registered in all the wheels of the totalizer. The type bars 32 are selected and operated according to this complement, but will print the true negative total inasmuch as the case shift mechanism has been operated and the upper case types of the type bars are the complement of the lower case types, all substantially as set forth in said Patent No. 2,192,365. It will thus be seen that the present machine is one that is capable or subtracting as well as adding in any one of the interspersed totalizers and is, moreover, capable of printing the true negative total from any interspersed totalizers that may be in overdraft condition. The present invention also provides for preventing release of the feelers 24I while the register units are being laterally shifted and, conversely, for preventing lateral shifts of the register units while the feelers are in engagement with the disks vI34. Therefore, the following mechanism is provided.

An arm 251, Figure 4, fixed to shaft 249 is connected by a link 258 to an arm 259 fixed to a transverse rock shaft 260 in the computing base. An arm 26I, Figures 2, 3 and 6, fixed to shaft 260 has a camming corner 262 and a dwell 263. A- pusher 264 is slidably supported on shaft 249 as at 265 and is pivotally connected at 266 to an arm 26! loosely fulorumed on a, shaft 213 which also carries the clutch latch arm 82. A side stud 268 on pusher 264 is normally in the path of said camming corner 262 of arm 26I.

during this rightward shift.

When carriage 22 becomes tabulated to a total-printing zone upon depression of a total-key lever 252, one or the other register shifting cam plates 204 may be depressed by its tappet 234 for a resulting lateral shift of the register units R to determine which of the interspaced sets of computing wheels is to be engaged by the feelers 2.

While shaft I 14 is being moved endwise and then rocked by cam I13, in either direction to effect a lateral shift of register units R, an edge 269 of an arm 210 fixed to said shaft I14 travers'es one of two blocks 216 and a lateral spur 2' presented by a branch 212 of arm 261 which is connected to pusher 264. Said edge 269 thus serves to block rise of the branch 212 and thereby blocks clockwise movement of arm 26I in that the c'amming corner 262 of the latter is blocked at the side stud 268. The described blocking of arm 26I during register-shifting rocking movement of shaft I14 blocks feeler-r-eleasing retraction of latch arm 248. It may be explained here that the register-shift control tappet 234 andthe total-control tappet 253 are off-set, in the direction of carriage travel, on the column unit 52 as in Figure 1-1. This provides for timing the lateral shift of the register units to occur ahead of the release of the feelers.

The locking operation is as follows: With the shaft I14 in its rightwardly shifted and correspondingly rocked position, Figure 6, the lower blocking end 269 of arm 216 of said shaft will be in the position a, relatively to the spur 2H and the blocks 216, seethe'enlarged scale plan view diagram, Figure 6A. At the start of leftward shift of shaft I14, its blocking-arm-end 269 immediately moves leftwardly to overlie the forward block 216; and at the end of the leftward shift, said blocking end 269 may have the position b, whereby counterclockwise rocking of lever 2 61, 212 and hence rightward withdrawal of stud 268, Figure 2, from the path of arm 261 are blocked to prevent release of the feelers 24 I. The leftward shift of shaft I14 positions the roller of arm I11 opposite the rotary cam I13 and consequently said cam immediately rocks shaft I14 counterclockwise thereby bringing the blocking end 269 to the position 0, Figure 6A, in which it is over the clearance afforded within the corner of -spur 21I and rear block 216 and, therefore, does not oppose the lever 261, 212 but leaves the latter free to rotate counterclockwise to permit the release of the feelers 241. In later rightward end wise shift of shaft I14, its blocking-arm-end269 moves from the position 0 to the position d, Figure 6A, and thereby moves over and opposes the rear block 216 to oppose release of the feelers 24I v This rightward shift of shaft I14 brings the roller, I18 of arm I16 again opposite cam I13 and the latter immediately rocks shaft I14 clockwise and brings its blocking end 269 back to the position a, Figure 6, in which position said arm-end 269 is over the clearance-space afforded within the corner of the forward block 216 and the spur 2H and does not oppose release of feelers 2. It will be seen. therefore, that release of the feelers 24I' is blocked during endwise and rocking movements of shaft I14 and during the corresponding arrowindicated movements defining a four-sided or orbital path, of blocking end 269 from a to b to c, or from c to d to a, Figure 6A.

Arm 210-m'a'y have clearance corners'214 defining the ends of the locking edge 269.

In either shifted position of-shaft I14, the side to arm 261 which has the branch 212.

of the inactive roller I18 stands at a slight space, see Figure 6, from the side of cam I13. By the time the endwise shift of shaft I14 has closed up the space, and has possibly brought the side of the inactive roller I18 to bear transiently against the side of the rotating cam I13, with attendant momentary delay of completion of the shift of shaft I14 and of shift of the registers, the block'- ing end 269 will be over one of the blocks 216. The locking mechanism thus becomes effective to block release of the feelers 24I even though the feeler-release cam plate 254 may have been depressed by the carriage before the endwise shift and rocking of shaft I14 have been completed.

Branch '212 and arm 210 may also interlock laterally to prevent lateral shifts of shaft I14, and hence of the register units R while the feelers 24I are in engagement with the disks I34. While the feelers are so engaged, an edge 248 Figure 4, of latch arm 248 may rest on top of stud 2-41 to keep said arm 248 in retracted position, said latch arm 248 having been retracted for result- 'ing release and movement of arm 245 and, hence,

of bar 243 so that the feelers 24I engage disks I34. This will keep dwell 263 on arm 26I opposite stud 268 to keep pusher 264 in position so that spur 2'' is placed in one or the other clearance corner 214 of arm 216. In such case, one or the other of the opposite lateral sides of the lower end portion of arm 216 is opposed by the side of a corresponding one of the two blocks 216 secured to opposite, front and rear, sides of spur 21I of branch 212 and thereby lateral shift of arm 210 and hence of shaft I14 to institute lateral shift of the register units R is opposed.

An arm 211 loosely fulcrumed on shaft 213 has a side stud 219 abutting clutch-latch arm 82. Said arm 211 is connected by a yoke 280 Therefore when clutch-latch arm 82 is retracted to institute closing of the clutch, arm 211 is correspondingly moved to raise spur 21I into one or the other clearance corner 214 of arm 210 and therefore branch 212 and arm 216 will be in lateral interlock at one or another block 216 to oppose lateral shift of the register units R as soon as the cycle clutch is tripped. The cycling clutch cannot be tripped while shaft I14 is being shifted endwise and then rocked to laterally shift the register units R because in such case one or the other block 216 and spur 21I will be opposed by edge 269 while the shift and rocking of shaft I14 are taking place and hence side stud 219 will oppose full clutch releasing retraction of clutch latch arm 82. Said arm 82 has its latching shoulder terminating in a cam bevel -82. The arrangement is such that the blocking edge 269 will permit retraction of latch arm 82 just far enough to bring said cam bevel opposite stud 89 so that the latter although released from said latching shoulder cannot move far enough to determine engagement of clutch pawls 93 with the driver 95. When the rocking of shaft I14 is completed, the rise of spur 21I may be completed into one or anotherclearance corner 214, and at this time closing of the clutch will be completed. Ifit should occur that the cycling clutch is tripped substantially at the same time that one or an other of the cam plates 264 is depressed, the described interlocking mechanism will constrain operation of the cycling mechanism and lateral shift of the register units R to take place in se quence instead of concurrently. For example, the spur 2' maybe blocked by the edge 269 in that the shift of said units takes precedence :with a traveling carriage, a plurality of registers,

up by blocking of the cycling clutch stud 89 by the camming bevel 82a of arm 82; when the register shift is completed, however, full retraction of the latch arm 82 takes place in that said spur III will then be opposite one or the other clearance corner 214. In a similar way a lateral shift of the register units and full forward movement of the feelers 241 are constrained to occur in sequence by the described interlock, mechanism if said feelers become released at the same time that one of the cam plates 204 is depressed.

It will be seen now that the invention provides for materially increasing the multipleregister capacity of the machine without substantially increasing the dimensions of the computing base; that any multiple-register unit is selectable automatically under control of the typewriter carriage and at the same time the carriage may also determine an automatic shift of the unit to render one or another set of computing wheels of the unit effective; and that the provisions for increasing the multiple-register capacity of the machine are readily applicable to existing designs of the Underwood-Hanson combined typewriting and computing machine,

Variations may be resorted to within the scope of the invention and portions of the improvements may be used without others.

What is claimed is: v

1. The combination with a traveling carriage, two registers, a common mechanism to cooperate with one or the other register, of a power-operated rotary cam device, a cam-follower structure movable by the cam-devicein one or another direction depending on one oranother position ,of the structure relatively to the cam-device, means enabling the carriage to determine said .one or another position, and means for translating the movement of the structure in one or another direction by the cam-device into corresponding movement of one Or the other reg- -ister into position for cooperation with the common mechanism.

2. In a computing machine, the combination and a common mechanism cooperative with one or another register, of a plurality of register selectors selectively operable by the carriage, a motor-driven rotary cam-device, a cam-follower structure, means cooperable with the selectors to relatively shift said cam-device and structure for .predetermining one or another direction of movement of the structure by the cam-device depending on which selector is operated, and means for translating the movements, in one or another direction, of the structure by the cam-device into corresponding relative shifts of the registers and said common mechanism for register selection.

was

3. In a computing machine, the combination 5 with a traveling carriage, a plurality of registers, and a common mechanism cooperative with one .or another register, of a plurality of register selectors selectively operable by the carriage, a motor-driven rotary cam-device, a cam-follower structure, means, including a yieldable connection, cooperable with the selectors to relatively shift said cam-device and cam-follower structure for determining one or another direction of movement of the structure by the cam-device depending on which selector is operated, said yieldable connection being operative to avoid jamming in case of occasional interference between the cam-device and structure when a selector is operated to effect their relative shift,

and means for translating .the movements, in one or another direction, of the structure by the cam-device into corresponding relative shifts of the registers and said common mechanism for register selection.

4. In a computing machine having interspersed sets of register wheels and a set of actuators common to the wheel sets; register mounting structure comprising a wheel frame, including side plates, in which the laterally interspersed sets of wheels are journaled and retained against lateral displacement; an outer frame including side plates, each side plate of one of the frames having two studs, and each side plate of the other frame having two openings to receive the studs to support the wheel frame for lateral shifts relatively to the outer frame to bring selectively one or another wheel set into line with said actua tors; means supporting said outer frame for movement transversely of the wheel axis to move the selected wheel set to and from the actuators;

and means having an operative connection with the wheel frame for shiftingthe, wheel frame laterally relatively to the outer frame, said connection bearing only laterally on the wheel frame so as not to impede the transverse movement of the wheel frame.

5. In a computing machine having a cycling general operator, the combination with a travelingcarriage; a multiple-totalizer unit; a set of actuators common to the totalizers of the unit, said unit and actuators being relatively shiftable to different positions to select one or another totalizer for cooperation with said actuators; a device operable before a cycle for determining engagement, during the cycle, of the selected totalizer and the actuators, and a tappet on the carriage tooperate said device; of operable elements, one for each of said positions; supplementary tappet-means on the carriage to operate said elements selectively before the cycle; and means immediately responsive to operation of any one of said elements to shift the unit to the position corresponding to the operated element if the unit is not in said latter position.

6. In a computing machine having a cycling general operator, the combination with a traveling carriage; two totalizers and a common mechanism with which either totalizer may cooperate by effecting opposite totalizer-selecting relative shifts of the two totalizers and said mechanism; of a selector for each totalizer; meansassociated with the carriage to operate the selectors selectively; a motor-driven mover capable of functioning at any time irrespective of cycling of. the general operator; a mover-operatable structure for relatively shifting the totalizers and mechanism, said structure being selectively positionable relatively to the mover and movable by the 'mover in either of opposite directions, depending on which position is selected; means controlled by the selectors to selectively position the structure relatively to the mover; and means for translating the opposite movements of said structure by the mover into corresponding relative shifts of the totalizers and said common mechanism for totalizer selection.

7. In an accounting machine having a traveling carriage, a laterally shiftable unit comprising interspersed totalizers, and a common mechanism associable with one or another totalizer as the unit is shifted; the combination of a power operated cam, a cam-follower structure, a lever having an operative connection to said follower structure and rockable in opposite directions to 1 7 shift ssaidstructurerelatively to said cam for predetermini-ng ione-oranother direction ;of movement of. the structure :by the cam,. means -for translating "the IllIlOVEIlIQIlll-S, :in :one 'or .another direction, of theostructurezby the :cam into corresponding-shifts .oflsaid unit to associate one or another totalizer with said common mechanism, and means operable by the carriage for rocking said lever selectivelyin one or another of said opposite directions.

8. In an accounting machine having a traveling carriage and a unitcomprising interspersed totalizers laterally shiftable-to associate one-er another totalizer with a common coopera-ble mechanism, the combination ofgapower-operated cam, a cam-follower structure laterally shittable relativelyto the cam so as to Joe-movable alternatively by the cam in opposite directions, means for translating the opposite movements of the structure by the cam into corresponding shifts of said .unit to associate one or another totalizer with said common mechanism, .two jacks, tappet means onthe carriage to operatesaid jacks selectively, .a l'ever'having operative connections to saidj'acks. so as to "be operable in one direction andalternatively in the opposite. directionsby alternate operations of said jacks, and means for transmittingthe operations ofpsaid leverin each direction 'to said follower structure for shifting said structure relatively to-.said cam.

9.'In an accounting'machine, the combination with interspersed totalizers shiftable laterally to associate one or another totalizer with common actuators, and total printing mechanism coopoperable with the totalizers and operable at a different time than the totalizer shifts, of a power-operated driver, a driver-operatable member for shifting said totalizers and shiftable laterally relatively to said driver in opposite directions preparatory to operation of said member, said member being operatable by said driver in one or another totalizer-shifting direction transversely to the lateral shift of said member, the lateral shifts and transverse operations of said member occurring alternately, namely, a lateral shift in one direction and consequent transverse operation in one direction and, later, an opposite lateral shift and consequent transverse operation in opposite direction, a locking element associated with said member and arranged to move in an orbital path as the lateral shifts and transverse operations of said member occur alternately, and a blocking means associated with said total printing mechanism, said locking element and blocking means being constructed and relatively arranged so as to be in opposition to each other to block operation of said total printing mechanism while said member is being laterally shifted and transversely operated and to block lateral shift of said member while said mechanism is being operated.

10. In an accounting machine having a travelling carriage, the combination of a totalizer support, a multiple-totalizer unit mounted in said support for lateral shifts relatively to the support to place selectively one or another totalizer opposite actuators individual to the unit, means mounting said support so that it is individually movable transversely of the direction of the lateral shift of the unit to move the selectively placed totalizer of the unit to and from the actuators, a bar mounted for endwise shifts longitudinally of the totalizer unit and having operative connection with said unit for laterally shifting the unit at the endwise shifts of the bar,;said;operative. connection being arranged to permit .the transversemovement .of said unit withiits support, .tappet .means on the carriage and mechanism :selectively.operab1e under control thereof to effect endwise shift :of the bar selectively'zto one or another position to place one or :another :totalizer of .the unit opposite the actuators, .andtappetmeans on the carriage and mechanism selectively operable under control thereof totransversely move the support.

111.:In anaccounting:machine, the combination with interspersed ttotalizers shiftable laterally I associate one for another .totalizer with common actuatorsand cycling mechanismopen able at a different time than thetotalizershifts, of a power-operated driver, a driver-operatable member for shifting said totalizers and shiftable laterally relatively to said driver in opposite directionsrpreparatoryto operation of said member by saidydriver in one or another totalizershifting directionxtransversely to the lateral shift of saidmember, the lateral shifts and transverse operations ofsaid member ;o.ccurri-n-g alternately, namely, a lateral shift in one direction and consequent transverse operation in one direction and, later, an opposite lateralshift and consequent opposite transverse operation in opposite direction, a locking element associated with said memberand arrangedto move in ,an orbital path as the lateral shifts and transverse operations of said memberoccur alternately, and a blocking means associated with said cycling mechanism, said locking element and blocking means being constructed and relatively arranged so as to be in opposition to each other to block operation of said cycling mechanism While said member is being laterally shifted and transversely operated and to block lateral shift of said member while said cycling mechanism is being operated.

12. A computing device comprising a, plurality of juxtaposed wheels for each denominational order, an actuator for each denominational order, means including a laterally shiftable sub-frame for eirecting relative movement between the Wheels and the actuators whereby engagement of the actuators is effected selectively with a corresponding one or another of the juxtaposed wheels of each order, means, in part shiftable with said sub-frame and in part non-shiftable, for causing a tens transfer from a lower order wheel to a higher order wheel in any selected engagement and in either rotative direction of the wheels, and means for introducing a fugitive one to the device in any selected engagement.

13. In a credit-balance computing machine having an automatic total printing mechanism, a multiple register unit constructed and arranged to accumulate accurate positive and negative totals from the entry of add and substract items, comprising interspersed sets of computing wheels so arranged that the Wheels of the same denominational order of each set are juxtaposed and further comprising tens-transfer operating elements, a single set of actuators for said wheels, means for conditioning the wheels of any set for actuation by the set of actuators, including a laterally shiftable sub-frame carrying said tenstransfer operating elements means for correcting the lowest order wheel of each set for a difference of one unit when the wheels of that set pass from a positive to a negative total or vice versa, and means associated with the automatic total printing mechanism for sensing a negative con dition of any of the sets of wheels.

14. In a computing machine, a multiple register unit constructed and arranged to accumulate accurate positive and negative totals from the entry of add and subtract items, comprising interspersed sets of computing wheels so arranged that the wheels of the same denominational order of each set are juxtaposed and further comprising tens-transfer operating elements, a single set of actuators for said wheels, means for conditioning the wheels of each set for actuation by the set of actuators including a shiftable sub-frame mounting said wheels and said tens-transfer operating elements, and means for correcting the lowest order wheel of each set for a difference of one unit when the wheels of that set pass from a positive to a, negative total or vice versa. V

15. In a machine of the class described, a plurality of registers, said registers having their wheels mounted on a common axis and interspersed so that the wheels of the same denominational order of each register are juxtaposed, a tens-transfer operating element for each wheel of each register, a single set of actuating devices for said registers and a, tens-transfer device foreach actuator, means including a laterally shiftable sub-frame for effecting a relative movement between said registers and said actuating devices to bring one or another register and its appropriate tens-transfer operating elements into posi- 20 tion to be operated by means operable by the tens-transfer operating element of the highest order wheel of each register for efiecting operation of the tens-transfer device of the lowest'order actuator.

HENRY L. PI'I'MAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,192,365 Pitman Mar. 5, 1940 2,258,714 Pitman Oct. 14, 1941 2,078,274 Pitman Apr. 27, 1937 778,965 Harrison Jan. 3, 1905 1,324,460 Martineau Dec. 9, 1919 1,505,385 Foothora Aug. 19, 1924 2,055,703 Perkins Sept. 29, 1936 2,160,487 Pitman May 30, 1939 1,161,026 .Chryst Nov. 23, 1915 1,185,143 Stickney May 30, 1916 1,270,242 Stickney June 18, 1918 1,279,687 Hanson Sept, 24, 1918 1,293,234 Stickney Feb. 4, 1919 1,909,715 Pasinski May 16, 1933 1,931,113 Muller Oct. 17, 1933 1,928,656 Von Reppert Oct. 3, 1933 2,155,991 Kurowski Apr. 25,

said actuating devices, and 

